| Project/Area Number |
18K14162
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 31010:Nuclear engineering-related
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| Research Institution | Nagoya University (2019-2020)
Japan Atomic Energy Agency (2018) |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Project Status |
Completed (Fiscal Year 2020)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 同位体分析 / レーザー分光 / キャビティリングダウン分光 / 光共振器 / 吸収飽和 / プラズマ分光分析 / プラズマ / 放射性廃棄物 / 同位体シフト |
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| Outline of Final Research Achievements |
A novel laser spectroscopic system consisting of an optical cavity has been developed to achieves high sensitivity and high wavelength resolution by causing absorption saturation. In this study, we demonstrated the feasibility of absorption saturation by experimental and theoretical approaches. First, we confirmed experimentally that the peak intensity of an absorption profile decreased by a few percent due to absorption saturation of an atomic-electronic transition at the incident beam intensity of 2 mW into the optical cavity. Next, two numerical models of cavity ring-down spectroscopy were proposed and their results suggest that the initial saturation and its relaxation process in a ring-down signal can be observed under a few mW of the incident laser beam intensity.
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| Academic Significance and Societal Importance of the Research Achievements |
従来の同位体分析では、サンプルを装置に導入する前の人手による前処理作業が分析コストや被ばくリスクの増加をもたらしている。本研究では、人手を要さずにサンプル分析を実現するため、高温プラズマとレーザー分光を組み合わせ、特定条件下で出現する物理現象を駆使する新しい分析法について、原理実証を行った。本手法は、化学分離等の専門的知識や付帯設備を必要とせず、単一装置のみで分析を完結できる利点もあり、原子力工学分野以外への適用も期待できる。
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